先说几句，我的初略看法。。。

1) 你的英语好像还得再提高些。。

a) If the job requires you to relocate to where your company is, then the question should be: will you be willing to relocate to xxxx?   It is not a question of your need. It is a question of your will.

b) Unless a specific problem is presented to you, a general question should be: How do you solve a problem?  Not the problem.

2) 你对工作没有应有的热情。。

从你对问题3和6的回答中可以看出。。

3）Is this a sales job or technical job or something else?

Your answer really depends on which type of job you are seeking.